//--------------------------------------------------------------------------
//	Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
//  All rights reserved.
//
//	Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//	Redistributions of source code must retain the above copyright notice,
//  this list of conditions and the following disclaimer.
//	Redistributions in binary form must reproduce the above copyright
//  notice, this list of conditions and the following disclaimer in the
//  documentation and/or other materials provided with the distribution.
//	Neither the name of the Drew Davidson nor the names of its contributors
//  may be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
//  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
//  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
//  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
//  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//--------------------------------------------------------------------------
package org.more.ognl;
import java.beans.IntrospectionException;
import java.util.Map;
/**
 * Implementation of PropertyAccessor that uses reflection on the target object's class to
 * find a field or a pair of set/get methods with the given property name.
 * @author Luke Blanshard (blanshlu@netscape.net)
 * @author Drew Davidson (drew@ognl.org)
 */
@SuppressWarnings("rawtypes")
public class ObjectPropertyAccessor implements PropertyAccessor {
    /** Returns OgnlRuntime.NotFound if the property does not exist. */
    public Object getPossibleProperty(Map context, Object target, String name) throws OgnlException {
        Object result;
        OgnlContext ognlContext = (OgnlContext) context;
        try {
            if ((result = OgnlRuntime.getMethodValue(ognlContext, target, name, true)) == OgnlRuntime.NotFound) {
                result = OgnlRuntime.getFieldValue(ognlContext, target, name, true);
            }
        } catch (IntrospectionException ex) {
            throw new OgnlException(name, ex);
        } catch (OgnlException ex) {
            throw ex;
        } catch (Exception ex) {
            throw new OgnlException(name, ex);
        }
        return result;
    }
    /** Returns OgnlRuntime.NotFound if the property does not exist. */
    public Object setPossibleProperty(Map context, Object target, String name, Object value) throws OgnlException {
        Object result = null;
        OgnlContext ognlContext = (OgnlContext) context;
        try {
            if (!OgnlRuntime.setMethodValue(ognlContext, target, name, value, true))
                result = OgnlRuntime.setFieldValue(ognlContext, target, name, value) ? null : OgnlRuntime.NotFound;
        } catch (IntrospectionException ex) {
            throw new OgnlException(name, ex);
        } catch (OgnlException ex) {
            throw ex;
        } catch (Exception ex) {
            throw new OgnlException(name, ex);
        }
        return result;
    }
    public boolean hasGetProperty(OgnlContext context, Object target, Object oname) throws OgnlException {
        try {
            return OgnlRuntime.hasGetProperty(context, target, oname);
        } catch (IntrospectionException ex) {
            throw new OgnlException("checking if " + target + " has gettable property " + oname, ex);
        }
    }
    public boolean hasGetProperty(Map context, Object target, Object oname) throws OgnlException {
        return hasGetProperty((OgnlContext) context, target, oname);
    }
    public boolean hasSetProperty(OgnlContext context, Object target, Object oname) throws OgnlException {
        try {
            return OgnlRuntime.hasSetProperty(context, target, oname);
        } catch (IntrospectionException ex) {
            throw new OgnlException("checking if " + target + " has settable property " + oname, ex);
        }
    }
    public boolean hasSetProperty(Map context, Object target, Object oname) throws OgnlException {
        return hasSetProperty((OgnlContext) context, target, oname);
    }
    public Object getProperty(Map context, Object target, Object oname) throws OgnlException {
        Object result = null;
        String name = oname.toString();
        if ((result = getPossibleProperty(context, target, name)) == OgnlRuntime.NotFound) {
            throw new NoSuchPropertyException(target, name);
        }
        return result;
    }
    public void setProperty(Map context, Object target, Object oname, Object value) throws OgnlException {
        String name = oname.toString();
        if (setPossibleProperty(context, target, name, value) == OgnlRuntime.NotFound) {
            throw new NoSuchPropertyException(target, name);
        }
    }
}